Related questions

Passing JSON data in Express Middleware

2018-07-11 03:40 Harry Cramer imported from Stackoverflow

I have the following route in my express app:

 app.post("/users/me/trackers/court_cases", caseValidator, DriversController.court_cases);

I would like to be able to pass information from my second middleware, caseValidator, to the third set of middleware. The second middleware currently fetches JSON data from a RESTful API, that I would like to pass along to the final route before sending it to the user.

Here's my current case validator function:

caseValidator = function(req, res, next){
    var case_id = req.body.case_id;

    var authOptions = {
        method: 'GET',
        url: `https://www.courtlistener.com/api/rest/v3/dockets/${case_id}/`,
        headers: {
            'Authorization' : "myauth"
        },
        json: true
    };

    var url = `https://www.courtlistener.com/api/rest/v3/dockets/${case_id}/`
    axios(authOptions)
        .then((response) => {
            console.log("success!")
            next();

            //// Pass in the JSON data to the next middleware?
        })
        .catch((error) => {
            res.status(400)
               .send(error)
        });
};

1 answer

  • answered 2018-07-11 05:12 Majid Sajadi

    you can use req.someVar.

    axios(authOptions)
   .then(response => {
        console.log("success!");
        req.someVar = response.data;
        next();
   })

    then in next middleware you have access to that data.

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        'auth' => \Illuminate\Auth\Middleware\Authenticate::class,
        'auth.basic' => \Illuminate\Auth\Middleware\AuthenticateWithBasicAuth::class,
        'bindings' => \Illuminate\Routing\Middleware\SubstituteBindings::class,
        'can' => \Illuminate\Auth\Middleware\Authorize::class,
        'guest' => \App\Http\Middleware\RedirectIfAuthenticated::class,
        'throttle' => \Illuminate\Routing\Middleware\ThrottleRequests::class,
        'fb.login' => \App\Http\Middleware\FacebookLogin::class,
        'cors' => \App\Http\Middleware\Cors::class,
        'auth.api' => \App\Http\Middleware\AuthApi::class,
        'role' => \Spatie\Permission\Middlewares\RoleMiddleware::class,
    ];
}

    This is my RouteServiceProvider.php file:

    namespace App\Providers;

use Illuminate\Support\Facades\Route;
use Illuminate\Foundation\Support\Providers\RouteServiceProvider as ServiceProvider;

class RouteServiceProvider extends ServiceProvider
{
    protected $namespace = 'App\Http\Controllers';

    public function boot()
    {
        parent::boot();
    }

    public function map()
    {
        $this->mapApiRoutes();

        $this->mapWebRoutes();

        $this->mapFacebookRoutes();
    }

    protected function mapWebRoutes()
    {
        Route::middleware('web')
             ->namespace($this->namespace)
             ->group(base_path('routes/web.php'));

        Route::prefix('ajax')
            ->middleware('web')
            ->namespace($this->namespace)
            ->group(base_path('routes/ajax.php'));

        Route::middleware(['web', 'auth'])
            ->namespace($this->namespace)
            ->group(base_path('routes/auth.php'));
    }

    protected function mapApiRoutes()
    {
        Route::prefix('api')
             ->middleware('api')
             ->namespace($this->namespace)
             ->group(base_path('routes/api.php'));
    }

    protected function mapFacebookRoutes()
    {
        Route::group([
            'middleware' => ['web', 'fb.login'],
            'namespace' => $this->namespace,
            'prefix' => 'fb',
        ], function () {
            require base_path('routes/facebook.php');
        });

        Route::group([
            'middleware' => ['web', 'fb.login'],
            'namespace' => $this->namespace,
            'prefix' => 'fb/ajax',
        ], function () {
            require base_path('routes/facebook_ajax.php');
        });
    }
}

    What I get is the Flash message shown when I navigate to base url of my site (for example: www.example.com).

    But, as you can see in the mapWebRoutes function, I apply only the web middleware to the web routes, so I do not why FacebookLogin middleware is called.
    I apply the FacebookLogin middleware only to "fb" and "fb/ajax" prefix routes.

    I noticed another strange behaviour: I get the message only if I visit https version of my website, not if I visit http version.